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Round DOUBLE when number too small instead of returning error SQL0405N

SAS calculations can return DOUBLE values smaller than Sailfish can store in a DOUBLE data type.

When a SAS dataset containing one of these values is written to Sailfish, the default datatype is DOUBLE and an error, SQL0405N, is returned.  Sailfish DECFLOAT can store these values, but SAS cannot currently read this datatype from Sailfish.

 

Suggest a setting controlled option to request that Sailfish round or truncate very small values so that Sailfish DOUBLE can store them without failing with an error.

  • Avatar32.5fb70cce7410889e661286fd7f1897de Guest
  • Oct 8 2019
  • Under Review
Db2
Who would benefit from this IDEA? Users of SAS statistical analysis software
How should it work?

IF 

A numeric value is inserted or loaded into a column of type DOUBLE whose magnitude is smaller (closer to zero) than the smallest number that Sailfish's DOUBLE datatype can legally represent

   AND

The user has set the controlling option ("don't fail on DOUBLE type out of range") to TRUE

 

THEN

The value is silently rounded to the closest numeric value that a double can represent (or truncated to zero if that is easier to implement) prior to being stored in the DOUBLE column

Idea Priority Urgent
Priority Justification SAS generates numeric values that cause DB2 to fail with an error
Customer Name Cox Automotive
  • Attach files
  • Avatar40.8f183f721a2c86cd98fddbbe6dc46ec9
    Guest commented
    8 Oct, 2019 06:22pm

    This would a useful registry variable that a client could set if they want this behaviour. As this was experienced with a client migrating from PDA/Netezza to a new IIAS/Db2 appliance. Appears the range for DOUBLE in Netezza is broader than it is for Db2. So this would help smooth the gap for compatibility when a client is migrating between these two IBM appliances/solutions. 

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